<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			div{height: 100px;width: 100px;}
			.change{background: yellow;}
		</style>
		<script src="js/jquery.min.js"></script>
	</head>
	<body>
		<div class="box">
			<div class="change"></div>
		</div>
		<div class="box">
			<div class="change"></div>
		</div>
		
	</body>
	<script type="text/javascript">
		$('.box').click(function(){
			$(this).find('.change').css({'background':'black'})
		})
	</script>
</html>
